The only reason to keep the stock ECU in a high power application is to run the gauges. With this, you don't need it at all, con't need to find space for another ECU box, and it's $400 cheaper than the Haltech. Plus, if you can control the gauges with the new ECU, you can program them to do whatever you want. Change the MPG gauge into a boost gauge. It's a well known system down in Australia and New Zealand. There is a tuner not far from me that uses them in Supra's and RX7's that can tune it, I was hoping to see someone with a Lexus that has installed it and done a write up.

The only reason to keep the stock ECU in a high power application is to run the gauges. With this, you don't need it at all, con't need to find space for another ECU box, and it's $400 cheaper than the Haltech. Plus, if you can control the gauges with the new ECU, you can program them to do whatever you want. Change the MPG gauge into a boost gauge. It's a well known system down in Australia and New Zealand. There is a tuner not far from me that uses them in Supra's and RX7's that can tune it, I was hoping to see someone with a Lexus that has installed it and done a write up.

1. Youíre wrong the stock ecu controls way more than you think. Including(what Iíve heard) windows, locks, pretty much anything that makes the car a streetable car. Look up canbus I think thatís what the wiring style is called. Basically itís 1 computer that controls all the systems. Instead of separate computers for each

2. haltech has more tuners that are familiar with it. And haltech is a reputable brand.